Friday, February 27, 2015
Search
  
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
Lenovo Offers Free McAfee LiveSafe Following Superfish Security Concerns
Yahoo Gains Search Share
Twitter To Offer More User Safety Features
Google to Start Ranking Mobile-friendly Sites Higher
Qualcomm Extends LTE to Unlicensed Spectrum to Enhance Mobile Experiences
Toshiba Develops Multicore SoC For Image-Recognition Applications
Samsung Says Semiconductor Technology Can Easily Scale Down to 5nm
Ericsson Sues Apple Over Patent Infringement
Active Discussions
burning
nvidia 6200 review
Hello
Burning Multimedia in track 0
I'm lazy. Please help.
sanyo e6 camera
need help on some cd burning...
Why Double Logins ?
 Home > News > Optical Storage > Digital...
Last 7 Days News : SU MO TU WE TH FR SA All News

Wednesday, September 26, 2001
Digital satellite radio goes live


The world's first satellite digital radio service has launched in the US, offering listeners hundreds of crystal-clear channels, but only if they pay a monthly subscription fee.

XM Satellite Radio, based in Washington DC, has introduced more than 100 channels on a trial basis in San Diego and Dallas. The company hopes that CD quality sound and the absence of advertisements on many channels will persuade listeners to pay $9.95 a month for the service. The first satellite radios will cost around $300 to buy.

XM Satellite Radio plans to roll-out a full nation-wide service in the US in November 2001 and a competing service from New York-based company Sirius will start in 2002. Both have spent $100 million on the required Federal Communications Commission (FCC) license.

XM broadcasts its programs through two geostationary satellites designed to remain above the US. Sirius takes a different approach, using three satellites circling the earth in high elliptical orbits.

Ground-based repeater stations are needed in areas where the satellite signal is obscured by buildings or hills. Radio antenna must be able to switch smoothly between different sources when a particular satellite or base-station is obscured. Error correction software and memory chips can be used to store sound for around four seconds to smooth over any gaps in a broadcast.

Prior to launch, some observers expressed concern about the complexity of such a system. But XM Satellite Radio says it used 100 people to beta test the system earlier in 2001. "Everything works fine," says spokesman Charles Robbins. "The equipment is able to switch seamlessly and listeners never have to worry about it."

If digital satellite radio takes off, some local radio broadcasters in the US may choose to offer digital as well analogue radio in order to compete.


Previous
Next
Universal Backs SACD        All News        Emergence of HDD Radio Cassette May Make MD Obsolete
Universal Backs SACD     Optical Storage News      Emergence of HDD Radio Cassette May Make MD Obsolete

Source Link Get RSS feed Easy Print E-Mail this Message

Most Popular News
 
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2015 - All rights reserved -
Privacy policy - Contact Us .